RelComm will bundle 300 minutes of app-to-app talking, valid for 30 days at Re 1, translating into 10 minutes usage per day under the limited period offer.

Users will get a daily data credit of 7 MB into their accounts that can be used to make these calls, Reliance Communications CEO Consumer Business Gurdeep Singh said.

These apps will include the likes of WhatsApp, FB Messenger, Skype, Google Hangout, imo and Viber.

RCom, which has 110 million subscribers, however, did not disclose the number of 4G users.

RCom's 4G LTE network operates in the 850 MHz spectrum band.

Operators in the country, including the likes of Airtel and Vodafone, have been pushing their 4G services launching offers like data credit and cheaper tariffs.

Market leader Bharti Airtel on Monday announced two plans with data tariffs effectively lower by an eye-catching '80 per cent'.

But the Rs 51 per GB data versus industry norm of Rs 250-plus comes with the caveat of an upfront payment of Rs 1,498 for a year. This essentially translates into 30 per cent saving for someone using 1 GB per month data and 37 per cent for 2 GB a month users.

Airtel, Idea and Vodafone have all increased data quotas on prepaid internet packs.

The Jio network is now available for free to most 4G smartphone users, with subscribers getting three months of unlimited data, voice and a suite of apps for free.